It could be hard shooting with hands holding the camera under dim light, there are three tips here that could help you.
The best way to stabilize the camera is to use your knees.
Hold the camera with both your hands, the left one holds the lens, the right one press the shutter.
Kneel down and separate the weight on both of your knees.
Hold up your camera ready for the shoot, put the camera high up in front of your right eyes.
Don’t lean, take a deep breath before you press the shutter.
Step 1: Portable tripod: Tired of bring tripod, create one yourself
Tie one end to the lens, the other drop on the ground
Stop on the other end on the ground and raise the camera slowly, stop when the rope is straight again.
Don’t be to pushy in case you break the lens.
Follow the first rule when the tripod is created